[PNJSNAK]

Jerry: your roll bar should be 1 3/4" in dia. Finish line sells 1 1/2" and 2" dia bezel kits. Yes thiers is oval for the rear down support bar. The 1 1/2" is to small and the 2" is too big.
Here's what you can do. You can use the 2" from finishline and fill in the gaps around the rubber grommets (Like what I did) or you can get the 1 1/2" size from finish line and very carefully use a 1 3/4" dia hole saw and carefully bore out the rubber grommets. I am told one can do this but be careful and slow when you are boring the grommet, of course I was told after I installed the 2" ones. OR you can simple use the grommets that come from A & C with out bezels like I did for three years.
Good Luck.
Jim